From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Rigg Subject: Re: Enabling in-kernel synch for M-Audio boards Date: Mon, 17 Sep 2007 20:44:03 +0100 Message-ID: <20070917194403.GA3655@localhost> References: <46EE555B.9000700@alice.it> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail3.uklinux.net (mail3.uklinux.net [80.84.72.33]) by alsa0.perex.cz (Postfix) with ESMTP id 0CEE924372 for ; Mon, 17 Sep 2007 21:39:22 +0200 (CEST) Content-Disposition: inline In-Reply-To: <46EE555B.9000700@alice.it> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Ludovico Verducci Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org On Mon, Sep 17, 2007 at 12:22:19PM +0200, Ludovico Verducci wrote: > Hello all! > > I'm developing a complex multichannel audio distribution system where > multiple linux boxes will stream audio data over ethernet and then > should play audio at sample level resolution synchronization. The boxes > clocks are synchronized over ethernet using PTP. > I need to keep in synch the audio board's clocks and I can't use an > external wordclock nor s/pdif. Won't this cause serious clock jitter problems? I don't see how the PCI bus can deliver precise enough timing, considering how much other data it has to handle. John